Electric regulation.



1. L. CREVELING. ELECTRIC REGULATION] APPLicATloN FILED JAN. 16, |912.

` w/NEssEs JM Patented Sept. 11, 1917.

JOHN L. CREVELING, OF NEW YORK, N. Y.,

ASSIGNOR TO SAFETY CAR HEATING AND LIGHTING COMPANY, .A CORPORATION 0F NEW JERSEY.

ELECTRIC .REGULATION.

Original application iiled. November 5,

To all whom t may concern:

Be it known that I, JOHN L. CREvEmNo, a resident of New York, in the county and State of New York, have invented certain new and useful Improvements in Electric Regulation, as set .forth in the annexed specification and drawing forming a part thereof.

My invention pertains to that class of electric regulation wherein it is desired to regulate anl electric circuit in a predetermined manner.

My invention has for its particular object to .provide means whereby the voltage impressed upon-'a translating circuit may be held -constant through changes in voltage at the source from which said circuit is fed.

IThis application is a division of my application','Serial No. 590,835 for improvement in electric regulation, filed November.

As my invention is particularly applicable to that class of systems wherein a generator is used to charge a storage battery and operate lamps or other translating devices,

vit will be described with reference to such a system.V

The drawing is a diagrammatic representation of one type of such system employing my invention.

In the drawing, 1 represents a dynamo or generator, the main positive brush of which is indicated at 2. 3 represents the usual field winding which is shown as having in series therewith a variable resistance 4 indicated as a .carbon pile, the operation of which is well known in the art. 5 is an iron core surrounded by thesolenoid 6 and normally pressed in such direction as to compact the pile 4 and reduce its resistance as by means of adjustable spring l7. The coil 6, when energized, tends to move. the core 5 against the action of spring 7 and increase the resistance 4 and prevent the generator voltage from exceeding a certain predetermined amount, which may be adjusted as by means of spring 7 ,inasmuch as the coil 6 is in shunt across the generator as indicated by means of wires 8 and 9. 10

represents a similar core normally pressed as by adjustable spring 11 in such direction as to tend to compact the ile 4 and decrease,

the resistance thereof. he coil. 12, surrounding core 10, when energized, tends to Specification of Letters Patent.

Patented Sept. 11, 191,7.

1910, Serial No. 590,835. Divided and this application filed January 16, 1912. Serial No. 671,418.

move the same against the action of spring 11 so as to decrease the pressure upon the carbon pile 4 and prevent the generator current output exceeding a certain predeter mined limit, adjustable as by spring 11 inasmuch as the said winding 12 is in series with the generator. The generator is shown automatically regulated in such manner that its current output and voltage cannot exceed certain predetermined limits.

In the drawing, the positive generator lead 29 is shown as carried from the positive brush 2 to the junction point 30 from whence -From the junction point 30, the wire 38 is carried to one end of the carbon pile 39, the opposite end of which is in 'electrical communication with movable member 40,

communicating with the wire 41, which is carried to the positive side of the translating devices 34. The member .40 is in electric communication with one end of the carbon pile 42, the opposite end of which is con-u nected as by wire 43 with the auxiliary brush 44 of the generator 1. The member 40 is carried by the pivoted lever 45 normally drawn in such 'direction by spring 46 as to tend to increase the pressure upon the pile 39 and decrease the pressure-upon the pile 42. The lever 45 is provided with an iron core 54, surrounded by the solenoid 47 which, when energized, tends to lift the core in such-manner as to decrease the pressure upon the pile 39 and increase the pressure on the pile 42. One end of the solenoid 47 is connected with the wire 41; the other end is carried to one end of the small carbon pile 48, the opposite end of which is in electrical communication with the lever 49 which isA electrically connected as by wire with the wire 33. The lever 49 is normally drawn downwardly by the adjustable spring 50 in such manner as to decrease the pressure upon the pile 48 and .increase its resistance, while the limit of motion that can be caused by the spring 50 may be reguu; ii

lated by the adjustable screw 51a The lever is provided with an iron core 52, sur- ',rounded by solenoid in shunt across the translation circuitu Energization of the coil 53, t :ids to lift the core 52 in such manner as to compress the cai-bons [i8 and lows the resistance'thereo.

The operation of my invention is substantially as iollows:-

li the dynamo be started, current will flow from the positive brush 2 tirough the i'ield 8, carbon pile Il, and return to the generator and. the iield will build up in a well known manner. Current will also flew tiirough wire 8, coil G, wire Sl, the gene ator and i so adjust the sprinf" Y that when. the maur mum desired voltag is reached across the generator the pressure upon the pile Il: will be reduced and its resistance increased. in such manner that this voltage will not be exceeded by 'the gene ator. li' the generator voltage be brought up to that point at which the switch 36 be set to close and if this voltage be in excess ot the voltage of the storage battery shown at current will flow 'to the battery as will hereinafter be more i'ully explained. ln' practice, l iind it advisable to so adj ust the switch Zilli that it will open and close at substantially the battery voltage and it is obvious that any preferred form et such switches may be employed which will pci'- Aterm Jihis function. many s ch switches are well known in the art and the particiiilar type thereot :l'orms no part of my present invention, l. have shown an, automatic switch operated by a simple shunt coil for 'the salve oil' simplicity merely to indica-te t uit sid switch is automatic and operated by diilerence potential across the generator'.

.ln the system shown in the drawing, iii the i'ranslating devices be in circuit current will liow from the unction point 30, through wire 355, carbon pile 3S). member il wire Lil, translating devices'3l to wire Current will also tend to 'low from the wire lill through the coil All", resistance A'll-S, lever i9 and wi i 55 to lead and current will. also dow through solenoid 53. lf the voltage across the generator circuit be equal or below the normal voltage desired across the translating devices, l se adjust the spring 50 and the screw 5l that there will be very slight pressure ilpon the carbon pile iS and the resistance of the said pile will be high5 then the 'current in the winding i7 will be quite small and l adjust the spring Lili so that the maximum pressure is exerted upon the pile 89 which Will then have its maximum resistance. Under these conditions the pile l2 will have its maximum resistance and the said pile is so arranged that under these conditions this resistance may, for all practical purposes,be considered as an open circuit. if new, the voltage across the generator circuit ,shall rise, the voltage across the translr-ting inserm current in the coil 17, which in turn, will lift the lever l5 against the action of spring i6 and increase the resistance 39 in such manner as to hold the voltage on the translation circuit substantially constant. At a proper point in the motion of the lever 45, the resistance of the pile 4t2 will be greatly reduced and may be considered 'almost negligible under certain conditions at which time, the resistance of 89 will be considerable and very little cuurent will flow therethrough. it this time most of the current supplied to the translating devices will flow from the auxiliary brush Ll/l, through wire 13, carbon pile 45)., member flO and wire l1 and as this current is tapped from a brush upon the cominutator at a point of lower voltage than trie main positive brush', and

the voltage oi' which may be readily adjusted by Selecting the proper position of the brush Lil, the lamps or other translating devices may be fed at considerably lower voltage than Vthat necessary to charge the battery without having in series therewith a resistance of such value as will cause appre eii r)le loss or trouble in the manner of the 'lissipalion ci heat. lf new, the voltage across the translating devices shall fall, a cycle the reverso of the above outlined will be gone through und the translation circuit uiaiu il will be in cil'ect, gradually shifted from connection,with the brush fil to connection with the brush 2 in an obvious manner. y

From the foregoing, it will be plain that l have produced a means ior holding the voltage upon a 'translation circuit substanfially constant throughout the rise necessary to charge a, storage battery which may be charged from a generator supplying also the said translation circuit without making such r igulation wholly dependent upon the dissipation olf the energy due to the dilierence oi potential of the respective circuits in the form of heat. rlhus l have produced a simple and more ellicient system for this purpose.

l do not wish in any way to limit myself to the details shown in the accompanying drawing, which is a mere diagramma-tiempresentation of one type of system embodying my invention, for it is obvious that Wide departure may be made therein without departing from the spirit and scope of my invention, which is as set forth in the following claims:

l. rlhe combination with a generator and means for delivering ther froin currents at diierent voltages, a storage battery in con 13e nection With said means adapted to be charged thereby, a translation circuit connected to said storage battery and said means through a variable resistance,- a second variable resistance connecting said translation circuit with one of said current delivering means of said generator at a voltage less than that supplied to said battery, and means responsive to voltage fluctuations in the translation circuit to determine through Which of said two resistances said translation circuit is to be supplied and to control the value of said selected resistance to maintain constant voltage on said translation circuit.

2. The combination With a generator and means for taking therefrom currents at different voltages, a storage battery in connection with said means, means for charging said storage battery from said generator, a translation circuit, and a variable resistance connecting the same with the storage battery, a variable resistance for connecting the translation circuit With one of the current collecting means of said generator at a voltage less than that supplied to the battery, and means for controlling said resistances.

3. The combination with a generator and means for taking therefrom Icurrents at different voltages, a storage battery in connect-ron with said means, a translation circuit and a varlable resistance connecting the same with the storage battery, a variable resistance for connecting the translation circuit With one of the current collecting means of said generator at a voltage less than that supplied to. the battery, and means for controlling said resistances responsive to fluctuations in the translation circuit.

4. In combination with a generator having a plurality of means for delivering current at different voltages; a battery and a translation circuit for receiving current from one of saidV delivering means; and means for automatically connecting the said translation circuit with another of said delivery means.

5. In combination With a generator having a plurality of means for delivering current at different voltages: a battery an a translation circuit for receiving current from one of said delivering means; and means for automatically connecting the translation circuit With another of said delivery means, Without disturbin the connection of the battery With said rst delivery means.

G. In combination With a generator and a plurality of means enabling the same to deliver current at different voltages; a battery and a translation circuit; connections from one of the delivery means to the battery and translation circuit; connections from another delivery means to the translation circuit; and means, controlled by conditions in the translation circuit, for deter mining which of sa'd delivery means shall supply said translat on circuit.

7. In combination With a generator and a `plurality/of means enalloling the generator to delivf current at different voltages; a battery and a translation circuit; a resistance in circuit with one of said means; a resistance in circuit With another of the delivery means; means capable of connecting with either of said resistances to control its value; and means for actuating the connecting means to cause 1t to operate upon either resistance according to conditions in the means to cause it to operate upon either ref sistance according to conditions in the translation circuit; and a translation circuit regulator and connections to the actuating means for influencing the actions of the latter upon the connecting means.

JOHN L. CREVELING.

Witnesses:

ANNA M. WALL, M. HERsKovITz. 

